What it means
The control pilot charging switch A reports a circuit/open condition. SAE J1772 charging signal handshake may be compromised.
At a glance
- Usually lights the check-engine light
- The engine or gearbox may go into limp mode
How it works
Control pilot charging switch A is a switch input associated with the EV charging control system. The module monitors its circuit, and this code sets when switch A's circuit is open, such as when its wire, switch, or connector terminal no longer provides a complete path.
Common causes
Most likely first.
- Open in switch wire
- Switch failed
- Pin pushed back out of connector body
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
How to diagnose it
- Check freeze-frame and charging-status data to confirm the open fault is associated with control pilot charging switch A.
- With the vehicle made safe according to service information, inspect switch A's connector for a disconnected plug or a terminal pushed back into the housing.
- Inspect the switch A wiring for a break, pulled connection, or visible damage.
- Check continuity through the switch A circuit and test switch operation against the manufacturer's specification.
- If the wiring and switch test correctly, check the related module connector and circuit for an open connection.
Common fixes
- Reconnect switch A's loose connector and secure its lock.
- Repair a broken switch A wire or restore a pushed-back terminal.
- Replace control pilot charging switch A if it fails its specified test.
- Repair an open connection at the related module connector if confirmed.
Can I keep driving?
This fault can prevent or interrupt charging, and the vehicle may limit operation, so follow any reduced-power or hybrid/EV warning and avoid relying on the vehicle for a long trip. Arrange prompt inspection if the vehicle's operation is restricted; stop using charging equipment with damaged connectors.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.